(19)
(11) EP 1 324 072 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.12.2003 Bulletin 2003/51

(43) Date of publication A2:
02.07.2003 Bulletin 2003/27

(21) Application number: 02027925.3

(22) Date of filing: 13.12.2002
(51) International Patent Classification (IPC)7: G01S 17/10, G01S 7/486, G01S 7/497
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR
Designated Extension States:
AL LT LV MK RO

(30) Priority: 14.12.2001 IT BO20010759

(71) Applicant: Datasensor S.p.A.
40050 Monte San Pietro (BO) (IT)

(72) Inventors:
  • Marchi, Paolo
    40026 Imola (IT)
  • Pilone, Ciro Adelmo
    40012 Calderara Di Reno (IT)

(74) Representative: Jorio, Paolo et al
STUDIO TORTA S.r.l., Via Viotti, 9
10121 Torino
10121 Torino (IT)

   


(54) Distance measuring device


(57) A distance measuring device (1) having an emitting unit (6) for emitting a light beam onto an object (2); a photoreceiver (10) for receiving and converting the light beam reflected by the object (2) into a first electric signal (SR) related to the distance (D) between the object (2) and the distance measuring device (1); a processing circuit (11) for processing the first electric signal (SR) to supply a second electric signal (ST) related to the distance (D) and to the internal circuit delays (ΔRIT) introduced by the processing circuit (11) when processing the first electric signal (SR); a signal generating circuit (7) cooperating with the processing circuit (11) to generate a delay signal (SRIT) related to the internal circuit delays (ΔRIT) in the second electric signal (ST); and a filtering and matching circuit (12) for eliminating from the second electric signal (ST) the contribution of the circuit delay (ΔRIT) indicated by the delay signal (SRIT), so as to supply a distance signal (SD) indicating the distance (D) of the object (2) from the distance measuring device (1).






Search report